Yas -coated Steel Pipe

Tianjin Lefin Industrial Co., Ltd yog ib lub tuam txhab muaj kev paub ntau tshaj plaws thiab cov chaw muag khoom ntawm cov yas -coated steel yeeb nkab hauv Suav teb. Thov koj xav tias dawb mus yuav cov yas zoo-coated steel yeeb nkab los ntawm peb lub hoobkas. Kev pabcuam zoo thiab tus nqi tsim nyog muaj.

Ntawm no yog ib qho kev piav qhia ntawm tag nrho cov lus nug uas koj nug: nws yog dab tsi, nws ua dab tsi, yuav siv li cas, seb puas yuav siv nws sab hauv thiab sab nraud, qhov tuab thiab cov qauv, kev ceev faj ntau lawm, thiab qhov tseem ceeb. Thov khaws nws kom yooj yim thiab nthuav dav li sai tau.

1. Plastic-coated steel yeeb nkab yog dab tsi?

Yas-coated steel yeeb nkab=Ordinary steel yeeb nkab (carbon steel / welded yeeb nkab / seamless yeeb nkab) + Ib txheej ntawm cov yas txheej rau ntawm phab ntsa sab hauv thiab sab nrauv (los yog phab ntsa sab hauv), los yog steel - cov yeeb nkab yas.

• Cov khoom siv hauv paus: Q235, Q345, thiab lwm yam. welded yeeb nkab / seamless yeeb nkab / kauv yeeb nkab
• Txheej: EP (epoxy resin), PE (polyethylene), PVC, thiab lwm yam hmoov, uas yog rhuab thiab fused rau saum npoo ntawm cov yeeb nkab steel.
• Structure: steel skeleton yas garment - Nws muaj lub zog ntawm cov yeeb nkab steel thiab qhov zoo ntawm cov yas corrosion kuj, tsis muaj scaling, thiab kev tu cev ntawm cov yas.

Hauv ib kab lus: Nws hloov cov kav dej zoo tib yam galvanized steel kav / cov kav dej dub, hais txog cov teeb meem xws li "rusting, scaling, corrosion, and secondary pollution", thiab yog siv rau kev thauj mus los ntawm cov kua dej hauv cov cheeb tsam xws li dej thiab dej, kev tiv thaiv hluav taws, tshuaj lom neeg kev lag luam, mining, gas, seawater, thiab circulating dej.

Yam xwm txheej:

• Cov kais dej hauv nroog, cov dej huv huv huv (kev nyab xeeb thiab tsis yog{0}} tshuaj lom)
• Cov tshuaj tua hluav taws / hluav taws kub hydrants (liab EP / PE, nplaim hluav taws)
• Chemical acid thiab alkali, ntsev tsuag ib puag ncig (EP tiv taus tshuaj)
• Dej hiav txwv, chaw nres nkoj, ntug hiav txwv dej (kev tiv thaiv ntsev tsuag)
• Kuv cov tailings, hnav- cov kav dej tiv taus (PE nrog zoo toughness)

1) Puas yog ob qho tib si sab hauv thiab sab nraud yuav tsum tau coated?
Feem ntau cov xwm txheej cuam tshuam nrog txheej txheej sab hauv thiab sab nraud; ob peb rooj plaub tsuas yog tsho sab hauv phab ntsa (rau dej) lossis tsuas yog phab ntsa sab nrauv (rau hauv av tiv thaiv-corrosion).

• Dej / Dej Haus: Coated ob sab hauv thiab sab nraud (puab phab ntsa zaub mov qib)
• Cov dej phwj hauv av / tshuaj lom neeg: Coated ob sab hauv thiab sab nraud
• Kev tiv thaiv hluav taws hauv tsev: Coated ob sab hauv thiab sab nraud
• Kev kho cov yeeb nkab qub: Qee zaum tsuas yog cov phab ntsa sab hauv yog coated

2) Cov txheej txheem tseem ceeb (tag nrho yog "hmoov melting thiab solidification", tsis yooj yim painting)

① Electrostatic txau (feem ntau siv, ob qho tib si EP / PE tuaj yeem siv tau)

• Preheat cov yeeb nkab steel rau 180-220 degree
• Cov hmoov yuav raug them, thiab cov tshuaj tsuag yog siv los tshuaj tsuag rau sab hauv thiab sab nraud ntawm cov yeeb nkab steel, ua tiav cov khoom siv electrostatic adsorption.
• Muab tso rau hauv qhov cub curing rau 15-20 feeb, melting thiab leveling rau hauv ib txheej tuab thiab tawv.
• Nta: nyias thiab sib xws, muaj zog adhesion, tuaj yeem pleev xim rau sab hauv thiab sab nraud

② Kub- txheej txheej (lub txaj fluidized, feem ntau PE)

• Preheat cov yeeb nkab steel rau 240-270 degree
• Raus hauv lub txaj fluidized ntawm PE hmoov, qhov twg cov hmoov melts thiab coats saum npoo thaum cua sov
• Secondary curing thiab txias
• Nta: Txheej tuab, muaj zog corrosion kuj, feem ntau yog siv rau sab nrauv phab ntsa los yog loj diameters

③ Nqus txheej (sab hauv phab ntsa me me - txoj kab uas hla ntev)

• Lub tshuab nqus tsev yog siv rau hauv lub raj, thiab hmoov yog nqus rau hauv
• Tig cua sov ua rau cov hmoov yaj thiab ua raws li cov phab ntsa sab hauv

Cov txheej txheem yooj yim:
Hlau yeeb nkab → Txiav kom tshem tawm burrs → Sandblasting rau xeb tshem tawm (Sa2.5 qib) → Preheating → Electrostatic spraying / Inorganic txheej → ziab → Txias → Tshuaj xyuas → ntim

1) Txheej thickness (GB / T 28897, CJ / T 120, thiab lwm yam)

EP (epoxy resin, nyias, ntom, kub -resistant)

• Sab hauv phab ntsa: 0.3-0.45mm (DN15-DN300)
• Sab nrauv phab ntsa: 0.3-0.8 mm
• Feem ntau siv rau kev tiv thaiv dej / hluav taws: 0.3-0.4 hli

PE (Polyethylene, tuab, toughness, hnav-resistant)

• Sab hauv phab ntsa: DN Tsawg dua lossis sib npaug ntawm 65 Ntau dua lossis sib npaug li 0.4 hli; DN 80-150 Ntau dua lossis sib npaug li 0.5 hli; DN Ntau dua lossis sib npaug rau 600 Ntau dua lossis sib npaug li 0.8 hli
• Sab nrauv phab ntsa: zoo tib yam Ntau dua lossis sib npaug li 0.6 hli; reinforced Ntau tshaj los yog sib npaug rau 0.8-1.2 hli

2) Sab hauv yeeb nkab phab ntsa thickness
Raws li lub teb chaws tus qauv rau cov kav hlau zoo tib yam (GB / T 3091), piv txwv li:

• DN15-DN150: 2.0-4.5 hli
• DN200-DN600: 4.0-9.0 hli

3) Cov qauv tseem ceeb

• CJ/T 120-2016: Wrought Plated Composite Water Pipes (Yuav tsum tau)
• GB / T 28897-2021: Kev qhia tshwj xeeb rau txheej rau sab hauv thiab sab nraud ntawm cov kav hlau
• GB/T 5135.20: Fireproof Wrought Plated Pipes

1. Kev tshem tawm xeb yuav tsum tau ua kom tiav (feem ntau tseem ceeb heev)

• Sandblasting/shot blasting rau Sa2.5 qib (ze -qib dawb)
• Roughness Ra 40-70 μm; Txwv tsis pub, txheej yuav zoo li tev tawm hauv 1-3 xyoos

2. Kev tswj qhov kub thiab txias

• Preheating: EP ≈ 220 degree, PE ≈ 250 degree
• Qhuav: EP 200-220℃/ 15-20 feeb; PE 180-200℃/ 10-15 min
• Kub kub → npuas, pinholes; Tsis tshua muaj kub → Tsis zoo adhesion, nquag mus rau hmoov los

3. Cov txheej yog sib xws thiab tsis muaj pinholes.

• Qhov sib txawv ntawm thickness ntawm sab hauv thiab sab nraud yog tsawg dua los yog sib npaug rau ± 10%.
• Electrospark test (2–5 kV) qhia tias tsis muaj kev puas tsuaj (pinholes=cov kab xeb)

4. Reinforcement ntawm cov yeeb nkab qhib thiab weld seams

• Repainting ntawm welds thiab cov yeeb nkab qhib, raws li cov cheeb tsam no feem ntau ua rau cov txheej tsis txaus thiab qhov ntxov tshaj plaws rau corrode.

5. Ib puag ncig huv thiab qhuav

• Cov av noo yuav tsum tsis pub tshaj 65%, txwv tsis pub cov hmoov yuav nqus dej noo thiab hluav taws xob zoo li qub yuav poob.

1. Ua tiav daws teeb meem corrosion thiab ua kom ntev kev pab cuam lub neej

• Ordinary steel kav: xeb dhau li ntawm 5-10 xyoo
• Yas -coated steel kav: kav rau 50 xyoo los yog ntau tshaj (30 xyoo los yog ntau tshaj nyob rau hauv ntsev tsuag ib puag ncig)

2. Kev nyiam huv thiab kev nyab xeeb, tshem tawm cov pa phem thib ob

• Sab hauv phab ntsa yog du, tsis xeb, tsis tsim nplai, thiab tsis tso cov hlau hnyav. Nws tuaj yeem siv ncaj qha rau cov dej haus ncaj qha.

3. Zog-txuag thiab kev xa dej siab

• Kev sib txhuam coefficient tsuas yog 1/5 ntawm cov kav hlau zoo tib yam, ua rau txo qis ntawm kwv yees li 18% hauv dej xa hluav taws xob, thiab txuag hluav taws xob rau qhov chaw nres tsheb.

4. Tus nqi qis dua

• Txawm hais tias nws yog 20-40% kim tshaj li cov kav dej galvanized, nws yuav tsum tsis muaj kev saib xyuas, muaj lub neej ntev, thiab yuav tsum tau hloov tsawg dua, ua rau txo qis tag nrho cov nqi ntawm lub neej.

5. Lub zog thiab corrosion kuj ua ke

• Nws muaj kev tiv thaiv siab dua, kev cuam tshuam zoo dua, thiab tuaj yeem muab faus piv rau cov kav dej ntshiab
• Nws muaj kev tiv thaiv corrosion zoo dua, kev tu cev zoo dua, thiab kev tiv thaiv qis dua piv rau cov kav dej ntshiab

Yas-coated steel yeeb nkab=Lub zog ntawm cov yeeb nkab steel + cov khoom tiv thaiv- corrosion thiab tu cev ntawm cov yas.

Nws yog coated rau ob sab hauv thiab sab nraud (feem ntau), siv electrostatic txau / kub-dip plasticating thiab siab-kub fusion vuam.

Lub thickness yog nruj me ntsis raws li lub teb chaws cov qauv raws li cov yeeb nkab txoj kab uas hla thiab cov khoom. Tus yuam sij rau kev tsim khoom yog nyob rau hauv kev tshem tawm xeb, tswj kub, thiab tsis muaj pinholes; Nws qhov tseem ceeb yog lub neej ntev, kev nyiam huv, txuag hluav taws xob, thiab txo nqi.